Abstract
Keywords
PCV valve, blow-by gas, micro crack, finite element analysis
Abstract
Recently, atmospheric contaminations become worse according to the increasing production of the automobile. PCV (Positive Crankcase Ventilation) valve acts as a flow control valve to get a re-combustion of blow-by gas by having it flow from a crankcase to an inlet manifold suction tube. By the way, during the fabrication of PCV valve, micro cracks may be occurred in the valve body and extended by working. The excessive stress distribution and crack initiation on the PCV valve body would be bring the unstable blow-by gas flow rate control and failure of the valve. The purpose of this study is that how the crack affects on the stress and strain variations on the PCV valve according to the in-outlet manifold differential pressures. From the results, we can explain the behavior of the crack extension for a safe condition of PCV valve.